参数配置统一

backend/rag_core/__init__.py

@@ -5,9 +5,17 @@ RAG Core - 公共 RAG 组件包
 """
 
 from .embedders import LlamaCppEmbedder
-from .vector_store import QdrantVectorStore, QDRANT_URL, QDRANT_API_KEY
+from .vector_store import QdrantVectorStore
 from .store import PostgresDocStore, create_docstore
 from .retriever_factory import create_parent_retriever
+from .config import (
+    QDRANT_URL,
+    QDRANT_API_KEY,
+    LLAMACPP_EMBEDDING_URL,
+    LLAMACPP_API_KEY,
+    DB_URI,
+    DOCSTORE_URI,
+)
 
 
 __all__ = [
@@ -15,6 +23,10 @@ __all__ = [
     "QdrantVectorStore",
     "QDRANT_URL",
     "QDRANT_API_KEY",
+    "LLAMACPP_EMBEDDING_URL",
+    "LLAMACPP_API_KEY",
+    "DB_URI",
+    "DOCSTORE_URI",
     "PostgresDocStore",
     "create_docstore",
     "create_parent_retriever",